Can a person use a quadratic formula to isolate the square in the process of completing the square?
The quadratic formula is arrived at by completing the square; therefore, theoretically one could use it to isolate the square through some simple rearranging:
Therefore, the square is b/(2a)
With some further rearranging, we can arrive at the quadratic in vertex form:
`h=b/(2a)` and` k=(c-b^2/(4a))` , where (h,k) is the vertex of the parabola.